VideoPortReadPortUchar

UCHAR VideoPortReadPortUchar(

PUCHAR  Port
);

VideoPortReadPortUchar reads a byte from a mapped I/O port.

Parameters

Port

Points to the port. The given Port must be in a mapped I/O-space range returned by VideoPortGetDeviceBase.

Return Value

VideoPortReadPortUchar returns the byte read from the adapter.

Comments

A miniport’s HwVidInterrupt or HwVidSynchronizeExecutionCallback function can call VideoPortReadPortUchar.

See Also

HwVidInterrupt, HwVidSynchronizeExecutionCallback, VideoPortGetDeviceBase